Title

Session Start Date

11-6-2014

Session End Date

11-6-2014

Abstract

In this research, the structural behavior of a new type of U.S. patented composite floor system is explored through finite element modeling. The new composite floor incorporates cold-formed (light-gauge) steel profiles as the joist on bottom, a corrugated steel deck as the formwork for concrete, a hat channel (furring channel) as the continuous shear connector and finally a concrete slab on top. All steel parts in the system are cold-formed and connected together by self-drilling fasteners. In this study, a comprehensive three-dimensional finite element modeling is performed for the composite floor system. A local bond-slip model is applied to simulate the slip of the shear connector inside the concrete slab. A nonlinear analysis is performed on the composite floor considering all different types of structural nonlinearities and the behavior of the system is monitored from beginning of loading all the way to failure. Results of finite element analysis are compared with experimental results. Further, during the course of this study, several parametric studies are conducted to determine the effect of bond-slip behavior on reducing ultimate strength and initial stiffness of such a floor system.

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Nov 6th, 12:00 AMNov 6th, 12:00 AM

Finite Element Modeling of New Composite Floors Having Cold-Formed Steel and Concrete Slab

In this research, the structural behavior of a new type of U.S. patented composite floor system is explored through finite element modeling. The new composite floor incorporates cold-formed (light-gauge) steel profiles as the joist on bottom, a corrugated steel deck as the formwork for concrete, a hat channel (furring channel) as the continuous shear connector and finally a concrete slab on top. All steel parts in the system are cold-formed and connected together by self-drilling fasteners. In this study, a comprehensive three-dimensional finite element modeling is performed for the composite floor system. A local bond-slip model is applied to simulate the slip of the shear connector inside the concrete slab. A nonlinear analysis is performed on the composite floor considering all different types of structural nonlinearities and the behavior of the system is monitored from beginning of loading all the way to failure. Results of finite element analysis are compared with experimental results. Further, during the course of this study, several parametric studies are conducted to determine the effect of bond-slip behavior on reducing ultimate strength and initial stiffness of such a floor system.